Background.
Since not all data can be adequately represented in Euclidean space [1]}, a large number of applications rely on graph-structured data.
For example, social networks can be modeled by regarding each user as a node in a graph where edges represent friendship relations [2]}, [3]}.
Alternatively, in chemistry, molecules can be modeled as graphs, with nodes representing atoms and edges encoding chemical bonds [4]}, [5]}.
